CSP41, a sequence-specific chloroplast mRNA binding protein, is an endoribonuclease.
CSP41, a sequence-specific chloroplast mRNA binding protein, is an endoribonuclease.
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CSP41是一种序列特异性叶绿体mRNA结合蛋白,是一种内核酸酶。
DOI:
10.1105/tpc.8.8.1409
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发表时间:
1996
期刊:
影响因子:
--
通讯作者:
Stern,DB
中科院分区:
文献类型:
--
作者:
Yang,J;Schuster,G;Stern,DB
Correct 3' processing of chloroplast precursor mRNAs (pre-mRNAs) requires a stem-loop structure within the 3' untranslated region. In spinach, a stable 3' stem-loop-protein complex has been shown to form in vitro between petD pre-mRNA, encoding subunit IV of the cytochrome b6/f complex, and chloroplast proteins. This complex contains three chloroplast stem-loop binding proteins (CSPs), namely, CSP29, CSP41, and CSP55. Here, we report the purification of CSP41 and cloning of the csp41 gene and show that CSP41 is encoded by a single nuclear gene. Characterization of bacterially expressed CSP41 demonstrates that this protein binds specifically to the 3' stem-loop structure and a downstream AU-rich element of petD pre-mRNA and that its binding affinity is enhanced by associating with CSP55. Our data also show that CSP41 has substantial nonspecific endoribonuclease activity. These data suggest that CSP41 could be involved in 3' processing of petD pre-mRNA and/or in RNA degradation. The fact that different reaction conditions favor RNA binding over ribonuclease activities suggests a possible mode of in vivo regulation.
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DOI:
--
发表时间:
1993
期刊:
European Journal of Biochemistry
影响因子:
--
作者:
C. Subbaiah;K. Tewari
通讯作者:
K. Tewari
影响因子:
3.6
作者:
C. Petersen
通讯作者:
C. Petersen
影响因子:
5.6
作者:
P. Régnier;E. Hajnsdorf
通讯作者:
E. Hajnsdorf
影响因子:
4.8
作者:
Boeck, R;Tarun, S;Sachs, AB
通讯作者:
Sachs, AB
影响因子:
4.8
作者:
David B. Stern;H. Jones;Wilhelm Gruissem
通讯作者:
Wilhelm Gruissem